Spark-plug.



Patented May 14, 1918.

2 4 E?, v Y

. BRGCK.

SPARK PLUG.

APPLICATION FILED MAR. 9, 19m, 3'9663425:

narran strains onerosi' y TOEN 0. BROCK, Gli WLMINGTGN, IIGRTH GARDENA.

ernaartoe.

Speeicaton of Letters Eatent. lgatfgnted Eday jid, .ig

Applieatitmy illed March 9, 1918. Serial No. 83,076.

' To all whom t may concern:

Be it lrnown that l, .lortu O. Bacon, a citizen or" the United States or" America, and 'resident of Wilmington, in the county of New Hanover and State of North Carolina, have invented certain new and useful l1n provements in Spark-Plugs, of which the following is a specication.

This invention relates to spark plugs for internal combustion motors and has for its object the provision oi novel means for admitting air, gasolene or other fuel to the cylinder through the spark plug, means being provided whereby the air or the iuel so admitted may be heated prior to its arrival in the cylinder; it having been found in practice that the device is elective te increase the elliciency of motors with a given quantity of fuel.

A further object of this invention is to provide a spark plug having an electrode with a superimposed wire of relatively high resistance which will heat under the in iuence of the electric current passing through the conductor or electrode, thus making it possible to raise the temperature of the air or fuel passing through the spark plug into the cylinder.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement `and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specication wherein like characters denote corresponding parts in the several views, and in which- Figure l illustrates a view in elevation of a spark plug with a primer embodying the invention Fig. 2 illustrates a vertical sectional view; and

Fig. 3 illustrates a sectional view on the line 3--3 of Fig. l.

In these drawings 5 denotes the body or the spark plug which is externally threaded at 6 for application to the cylinder and the bottom portion of the body has a restricted opening 7, the wall of which lconstitutes a terminal to which the spark jumps from the electrode S, which electrode extends through an insulating material or porcelain 9 as in 'spark plugs now in common use. The means for holding the electrode in the body and In practice, it has been possible for the inventor to utilize products of hydro-carbon oils with specific gravities greater than that of gasolene and that result has been attained by reason or' the fact that provision is made for raising the temperature and vaporizing the said products by heat.

There is an annular channel 12 between the side of the porcelain or insulator 9 near the bottom thereof and they internal wall of the body and this annular channel affords space for the circulation of the air or fuel delivered to the spark plug.

As a means for delivering oil to the interior of the body of the spark plug, a curved tube 13 is tapped in the wall of the said body at le and the upper end of said tube is internally threaded as at 15. Below the threaded portion of the said tube, there is a shoulder 16 forming a seat for a spring 17, which spring yieldingly supports a ball-18, which ball constitutes a valve for control ling the ingress of air or fuel. The ball 18 coacts with a valve seat 19 formed at the junction of the nipple 2O and the cup 21 andl as the cup is rotated. the threads of the nipple engage the vthreads of the tu'be and the pressure on the spring 17 is increased or diminished according to the direction of the rotation. Ey reason of the presence of the adjusting means just described, the ball Avalve 18 and the parts with which it is associated may be adjusted so that it will yield to the induences of internal combus` tion motors of dierent capacities; that is 100 to say, it may be adjusted to yield where the compression in the cylinders'is of increased or diminished degrees, thus making the spark plug adaptable, as stated, to the diff,- ferent conditions of use.l v

l claim: 7 Y 1n a spark plug, a body having a guarded opening in one side for delivery of fuel, an

insulator extending partially through the body, an electrode in the insulator project?I 110 15510.@ Wim and said becly.

coiled Wire encircling 'the electrode ai', the nth@ i1'es9me @i owm 9nd thereof, the lwermos'b ccmvoluhun of fha wir@ being in proximity the Wall of tha body for conducting the surfent for oaducng n spark in the gap bylaw-een two Witnesses,

OHNY'O. BRGCK. 

